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From: Bill Sloman <bill.sloman@ieee.org>
Newsgroups: sci.electronics.design
Subject: Re: Heating for fusion, Why toast plasma when you can microwave it?
Date: Sat, 10 Aug 2024 15:01:34 +1000
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On 10/08/2024 1:56 am, John Larkin wrote:
> On Fri, 09 Aug 2024 06:38:37 GMT, Jan Panteltje <alien@comet.invalid>
> wrote:
> 
>> On a sunny day (Fri, 9 Aug 2024 02:18:17 +1000) it happened Bill Sloman
>> <bill.sloman@ieee.org> wrote in <v92r4h$3fk7$1@dont-email.me>:
>>
>>> On 8/08/2024 8:23 pm, Jan Panteltje wrote:
>>>> On a sunny day (Thu, 8 Aug 2024 17:13:36 +1000) it happened Bill Sloman
>>>> <bill.sloman@ieee.org> wrote in <v91r78$3pjer$3@dont-email.me>:
>>>>
>>>>> On 7/08/2024 3:27 pm, Jan Panteltje wrote:
>>>>>> Heating for fusion: Why toast plasma when you can microwave it!
>>>>>>     https://www.sciencedaily.com/releases/2024/08/240806131216.htm
>>>>>>      Carving a new path forward for compact fusion vessels
>>>>>> Date:
>>>>>>     August 6, 2024
>>>>>> Source:
>>>>>>     DOE/Princeton Plasma Physics Laboratory
>>>>>> Summary:
>>>>>>     Can plasma be sufficiently heated inside a tokamak using only microwaves?
>>>>>>     New research suggests it can! Eliminating the central ohmic heating coil
>>>>>>     normally used in tokamaks will free up much-needed space for a more compact,
>>>>>>     efficient spherical tokamak.
>>>>>
>>>>> Not so much carving a new path as looking for one. Maybe be gyrotrons
>>>>> can heat the plasma enough, but planing to do experiment which can test
>>>>> whether they can isn't exactly carving a new path - more just looking at
>>>>> a possible new path.
>>>>>
>>>>>> Bye bye ITER and that otehr fusion attempt mayonaise thing
>>>>>>     https://www.sciencedaily.com/releases/2024/08/240806131357.htm
>>>>>>      Researchers dig deeper into stability challenges of nuclear fusion -- with mayonnaise
>>>>>>
>>>>>> Now all I am waiting for is a 10 year old kid doing a better than break even fusion experiment in its parents kitchen...
>>>>>
>>>>> You may have to wait a long time. Mayonaise may exhibit Rayleigh-Taylor
>>>>> instability, but the lessons it might be able to impart would be
>>>>> difficult to translate into totomak design.
>>>>
>>>> I like that Farnsworth fusor thing
>>>
>>> Of course you do. You are too dim to notice that it can't generate
>>> enough energy to be a useful energy source - though it can be a handy
>>> source of neutrons if you need them.
>>>
>>> This spelled out if the link you posted, but clearly didn't read.
>>>
>>>> They mention the grid gets too hot as a problem.
>>>> Why not use a water filled pipe as grid,
>>>> heat the water to steam, drive a small steam engine
>>>> that drives a generator that drives a HV converter,
>>>> simple electronics, there is a table top experiment.
>>>>    https://en.wikipedia.org/wiki/Fusor
>>>>     so many simple ways to improve that setup!
>>>
>>> But none are going to make it an energy source.
>>
>> Yea, and planes could never fly as those were heavier than air.
>> There are solutions, some are simple.
>> I have been posting about that Farnsworth fusor many times, but your amnesia must have gotten to you again.
>>
>> What will never produce energy is the large political job creation projects for albert onestone parrots like ITER is.
>> Or that laser fusion crap in 'merrica.
> 
> NIF is really about nuclear weapons, but the over-unity energy yield
> is interesting.

It serves to give the physicists involved something they can publish in 
the peer-reviewed literature, but it is a long way from any kind of 
practical application.

https://hb11.energy

is more promising, not least because hydrogen-boron fusion doesn't 
generate neutrons which mess up the hardware that create the conditions 
for fusion.

>> Same for anti-gravity.
>>
>> This is fun info too, previous thing you did not graps:
>> Carvings at ancient monument may be world's oldest calendars
>>   https://www.sciencedaily.com/releases/2024/08/240806131238.htm
>>   comets causing glowball cooling?
>>
>> As to solder, when was the last time your front limbs held a soldering iron?
> 
> Good question!

Not really. It speaks to the point that I'm not much involved in 
practical electronics at the moment, though I do persist in applying for 
the occasional job. John Larkin can't be bothered to put in the parallel 
capacitance of his simulated inductors in his LTSpice simulations, but 
still thinks that he is doing practical electronics.

-- 
Bill Sloman, Sydney

-- 
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